warrington



2 N 0 T G N I R R A W (No Model.)

ROLL GRINDING MACHINE N0. 349,544. Patented Sept. 21,1886.

IN VEJV' TOR.

WITNESSES.

N4 PETERS. Phomuxho n mr. Washingion. D. C.

(No Model.) 2 Sheets-Sheet 2.

J. WARRINGTON.

ROLL GRINDING MACHINE.

No. 349,544. Patented Sept. 21,1886.

n. PEIEIS. Fhahrlkhognbher, waning, n.c.

UNITED STATES PATE T OFFICE.

JESSE IVARRINGTON, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-HALF TO THE NORDYKE 8t MARMON COMPANY, OF SAME PLACE.

ROLL-GRINDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 349,544, dated September 21, 1886.

\ Application filed Octoberfll, 1885. Serial No. 181,018.

To all'whom it may concern.-

Be it known that I, JESSE \VARRINGTON, of the city of Indianapolis, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Roll-Grinding Machines, of which the following is a specification.

The object of my said invention is to produce a machine for grinding rolls, whereby said rolls may be given an accurate and per.- feet finish, and thus fitted for use in rollermills or other places where a straight and true surface is essential.

It consists in certain improvements in such machines, whereby great accuracy of operation is secured, as will be hereinafter more particularly described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a top or plan View of a machine embodying my said invention; Fig. 2, a front elevation of the same, showing also the belts and pulleysby which the same is driven; 2 5 Fig. 3, a rear elevation; Fig. 4:, a transverse vertical sectional view, looking toward the left from the dotted line 4 4 in Fig. 3; Fig. 5,

- a view, partly in top plan and partly in hori zontal section, as seen when looking downwardly from the dotted line 5 5 in Fig. 7; Fig. 6, a transverse vertical sectional view, as seen when looking toward the left from the dotted line 6 6 in Fig. 5; Fig. 7, a view, partly in front elevation and partly in vertical section, 35 as seen when looking upwardly from the dotted line 7 7 in Fig. 5; Fig. 8, an under side plan of thenut and its mountings through which the screw-shaft for operating the carriage passes, and Fig. 9 a detail sectional view on the dotted line 9 9 in Fig. 8.

In'said drawings, the portions marked A represent the bed-plate or frame-work of the machine; B, the roll-driving shaft; O, the

power-shaft carrying the driving-pulleys; D, the grinder; E, the head-block carrying the same; F, the traveling carriage carrying said head-block; G, the screw-shaft for operating saidcarriage; H, a shifting-clutch for reversing the motion of said screw-shaft; I, a hose,

and J a roll in position in the machine, ready to be operated upon.

(No model.)

thus forms also a tank for thereception of the water as it falls from the roll which is being ground, it being necessary to the successful operation of this machine that a stream of Water should be constantly directed upon the portion of the roll being operated upon. The water is conducted to the proper point by a hose, I, having a nozzle, a, as shown in Fig. 2, preferably from a tank located above the ma chine, and the water, after being used, may be returned to said tank from the tank formed I by the frame-work A, by means of a pump, (not shown,) if desired, and thus rendered subject to repeated use. At the rear side of the frame-work a heavy slide-bar, A, is socured to this frame-work by means of stout 7o bracketsa, and serves to hold the grinding mechanism toward the roll to be operated on with steadiness and accuracy. The front face of this slide-bar is dressed true and smooth, and is arranged parallel with the axis of the roll to be ground when said roll is in position in the machine.

The shaft B is mounted in bearings or pillow-blocks a on the frame-work, and is adapted by means of a chuck, I), secured thereto, prefso erabl y by means of a universal joint, as shown, to be attached to the shaft of the roll being operated upon, and thus drive said roll, it being necessary that the roll-being operated upon should be in motion, as well as the grinder. This shaft is driven from the power-shaft by means of a belt, B, and suitable pulleys, b c, as shown most plainly in Fig. 2. As also shown, the pulleys are so proportioned that the movement of the roll being ground shall 0 be comparatively slow. p

The power-shaft O carries the driving-pulley 0 for driving the shaft B, as just described, a long drum or pulley, c, for driving the grinder, and a pulley or pulleys for driving the 5 driving-screw of the traveling carriage. Two of these, 0 c are shown, either of which may, by means of a shifting-clutch, c, be made to drive a counter-shaft, GT, and thustwo different speeds of said counter-shaft are provided :00 for, as will be readily understood by an examination of the drawings, (see Fig. 2,) which show these pulleys as differently proportioned, and thus I adapted to accomplish this result through the belts C O, mounted thereon.

The grinder D is afine grindstone or emery or other grinding whee], having an appropri ate shaft or mandrel, d, mounted in bearings in the head-block in such a manner as to be held rigidly toward the roll while in operation. In order that this grinder may be free from anylost motion in its bearings, I have devised a peculiar form of boxes or bearings in. which its mandrel d is mounted. On each side of said grinder flat vertical surfaces are prepared on the head-block, against which rest heavy boxes (1, having corresponding flat surfaces on their rear sides and concave spaces in their front sides to fit on the mandrel. Thus it will be seen these boxes are perfectly free to move vertically, but are adapted to hold the grinder toward the roll to be treated, and,being placed close alongside said grinder, on both sides thereof, preclude any springing of the mandrel, and thus hold the grinder uniformly in .position. Just outside these boxes are formed other surfaces on the the head-blocks, substantially at right angles with the pull of the belts, and against these surfaces rest boxes d similar in all respects to the boxes (1, except in arrangement, beingpermitted to move freely in the direction at right angles with the pull of the belts, and thus resisting such pull perfectly. Said belts, c serve to sustain the grinder and hold said boxes (1* against the surfaces described. The belt-pulleys are placed on the mandrel, either between these two boxes. or outside the outer ones, preferably the latter. By this arrangement the mandrel of the grinder is held practically rigidly in position, and consequently true and even work can be depended on therefrom.

- The head-block E carries the bearings for the mandrel of the grinder, and is mounted in a transverse slot or way in the central portion and engages with said head-block, as clearly shown in Fig. 4.

The traveling carriage F rests upon the ways a on the frame-work, and is provided with a'heavy guide-bar, F, having a flat surface which rests against the correspondingsurface of the slide-bar A, and the whole is driven back and forth in operation by the screw-shaft G. The ways a are preferably inclined somewhat, as shown in Fig. .4, and the weight of the head-block thus tends to hold it firmly back, so that the guide-bar F will at all times be in contact with the slide-bar A, thus preventing any lost motion in this direction.

The screw-shaft .G is mounted in suitable bearings, g, 011 the frame-work A, and is pro- 'vided with loose pulleys G and G", by which it is driven through one or the other of the belts g g from the pulleys c c on the shaft 0.

Said screw-shaft G engages with a nut, g

the movement of the carriage.

The clutch H is mounted on the screw-shaft G between its pulleys, and is adapted to be thrown into engagement with either, and thus drive said screw-shaft in one or the other direction by means of a rock-shaft, h, the rod H engaging with a weighted arm, h, thereon, said rod being operated by a fork, f, on the traveling carriage F, which, as it moves back and forth, comes in contact with suitable collars on said rod, as shown in Fig. 3, said rockshaft being provided at its inner end with a forked arm, which engages with a circumferential groove in said clutch in the ordinary and well-known manner.

The operation may be briefly recapitulated as follows: A roll, J, is placed in the machine and connected to the shaft B by means of the chuck b, and is properly adjusted by means of the bearings a, (which are adj ustable,) and the head-block is adjusted so as to bring the grinder into contact therewith. The machine is then set in motion, revolving both the roll and the grinder, and driving the grinder back and forth in front of the roll. Both being in motion and the grinder being rigidly held to ward the roll, the result is to produce a per fectly smooth and even surface on said roll, as before indicated.

Having thus fully described my said inventioirwhatlclaim as new, and desire to secure by Letters Patent, is

1. The combination, in a roll-grinding machine, of the bed-plate or frame-work having a slide-bar, A, provided with a straight flat surface, a traveling carriage mounted on ways on said frame -work, and provided with a guide-bar, F, fitted to rest against and slide upon said slide-bar, a head-block carrying the grinder mounted and transversely adjustable on said traveling carriage, and a screw-shaft for driving said traveling carriage back and forth.

2. The combination, in a grinding-machine, of the bed-plate or frame-work having inclined ways a", a slide-bar, A, the traveling carriage F, mounted upon said ways, and having a guide-bar resting against said slide-bar, a head-block, E, mounted and transversely adjustable on said traveling carriage, and a grinder, D, mounted in said head-block.

3. The combination, in a grinding-machine, of the grinder, the head-block having flat surfaces at right angles with the strain of the work and pull of the belts, and boxes having flat Surfaces resting against said flat surfaces on said head-block in which the mandrel of said grinder is mounted, each set of boxes thus resisting the strain in one direction only, substantially' as set forth.

4. The combination, in a rollgrinding machine, of the grinder D, having mandrel d, the head-block E, having flat surfaces as described, and the boxes (1 and d", independently mounted and resting against said flat surfaces, substantially as set forth. a

5. The combination, in a roll-grinding machine, of the frame-work, traveling carriage mounted thereon carrying the grinder, a screwshaft for driving the same, and a nut through which said screw-shaft passes, said nut being pivotally mounted in a hearing-block in one direction, and said bearing-block being pivotally mounted at an angle with said nut, substantially as set forth.

JESSE VVARRINGTON. [In

\Vitnesses:

G. BRADFORD, E. W. BRADFORD. I 

